I use the Colgate mouth wash that removes them, they are very minty..but the result is great!

I used Colgate mouth wash too in any pharmacy. They were recommended to me when I had my braces. They were life savers when the metal scar my gums. at most three days that were gone.

But most ulcers comes from bad digestion. Like the gas is coming up your throat. So if you have ulcers not only do you want to get rid of the pain you also want to see what you recently eat that didn't agree with your stomach. And stay away from acidic food so you want have more ulcers.

Eat more fruits adn drink plenty of water...
There is a chinese medication that will help, name Hou Fung Shan.. Taste lil bit bitter but help.
Also there's doctor's medications too, depends on the type of ulcer u have. It can help heal quicker and less pain...
To prevent in first place, eat plenty of fruits and drink enoough water everyday. U still can have ulcer by trauma (maybe get bitten by accident when u eat), or something wrong with the tooth in that place, etc...

the doctor say ulcer is due to lack of sleep and certain amount of stress and lack of victim C. So make sure you eat lots of veg, fruits, less junk and fast food and fry food. I use this chinese spray, made from watermeln, dunno the name for it though >< but onli work when you spray before it turn HUGE!!!

My little brother is suffering from the same ailment and mom bought bonjela gel; -live urls are not allowed in your usergroup- for him. When mom applied the gel on the affected area…oh God my brother screamed so loud. I guess it caused him too much of pain but after a few seconds he clamed down and was telling mom that he feels okay. why don't you try this gel?

how to precent ulcers forming? well, it is difficult. haha. but you can probably just dont get yourself 'heaty'..when you are 'heaty', you are likely to get ulcers. 'bonjela' doesnt really work, but at least it can reduce inflammation. let time passes and the ulcers will be gone by itself.

use vinegar to burn it off, for me is the quickest way. usually the form in the areas where your tongue is contact with your teeth alot. so try consciously not moving your tongue as much as possible.

how to prevent? everyones different in terms of how they get them, i knew a girl who'll get a mouth full of 'em, not just on tongue, gums too!! and she only gets them when she's under pressure. i get them very rarely and it only helps if you don't eat so much heaty food.

Cure: eat vitamin B2 and C tablets. It helps to heal wounds quickly, also drink alot of water. If you have 'inner heat', dont stay up too late. If you lack of vitamins, eat the tablets and also lots of fruits.

Prevention: Still, dont stay up too late. Your body detoxifies the best at 11-2am. Drink lots of water and eat fruits (but not oranges, cos it's heaty.. eat banana!). DONT eat heaty foods like fried stuffs and those that are high in fats.

Hope that helps. For a temporary solution to ease your pain, sprinkle salt on your wound. Kinda 'numb' your wound for a little while, or bite on it